MD Pennsylvania November 1971 casesU.S. v. 137.02 Acres of Land, Etc., Cmwlth. of Pa.Minersville Coal Co. v. Anthracite Export Ass'nUnited States v. AhmadHerman v. C. O. Porter Machinery Co.Aviation Associates of Puerto Rico v. Dixon CompanyServomation Mathias, Inc. v. EnglertPowell v. Kull